1. An unexecuted order that is still valid. An open order is one that has been placed either electronically or with a broker and has not been filled due to illiquidity or the terms of the position not being fulfilled

2. The start of trading on a securities exchange. The open on a trading exchange signals the start of an official day for the exchange, and that buy and sell transactions can commence for the business day.


1. Orders that are entered by investors but not transacted are deemed to be open until they expire or are filled. Different orders, such as limit or stop order can influence if or when an order is filled.

2. Different exchanges will have different opening times. For instance, the New York Stock Exchange (NYSE) and the Nasdaq open at 9.30 am EST, whereas the American Stock Exchange (AMEX) opens at 9 am EST for options on debt securities.

  1. Day Order

    An order to buy or sell a security that automatically expires ...
  2. Cancel Former Order - CFO

    An order from an investor to a broker, to cancel a previously ...
  3. Good This Month - GTM

    A limit order to buy or sell a security that remains in effect ...
  4. End Of Day Order

    A buy or sell order that specifies a price for the security, ...
  5. Limit Order

    An order placed with a brokerage to buy or sell a set number ...
  6. Bracketed Buy Order

    Bracketed buy order refers to a buy order that has a sell limit ...
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